64366919 has 2 divisors, whose sum is σ = 64366920. Its totient is φ = 64366918.

The previous prime is 64366891. The next prime is 64366933. The reversal of 64366919 is 91966346.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64366919 is a prime.

It is a super-2 number, since 2×64366919² = 8286200523105122, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 64366919.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64366999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32183459 + 32183460.

It is an arithmetic number, because the mean of its divisors is an integer number (32183460).

Almost surely, 2^64366919 is an apocalyptic number.

64366919 is a deficient number, since it is larger than the sum of its proper divisors (1).

64366919 is an equidigital number, since it uses as much as digits as its factorization.

64366919 is an evil number, because the sum of its binary digits is even.

The product of its digits is 209952, while the sum is 44.

The square root of 64366919 is about 8022.8996628401. The cubic root of 64366919 is about 400.7629583943.

The spelling of 64366919 in words is "sixty-four million, three hundred sixty-six thousand, nine hundred nineteen".